Daily US Times: The World Health Organization has said, a large number of poorer countries receiving Covid-19 vaccines through a global sharing scheme named Covax do not have enough doses to continue programmes.
Dr Bruce Aylward, a senior adviser to the WHO, said the Covax programme had delivered 90 million doses to 131 countries.
But he said this was nowhere near enough to protect populations from Covid-19 still spreading worldwide.
The shortages of vaccines come as some nations in Africa see a third wave of infections.
South African President Cyril Ramaphosa on Monday called for an end to vaccine hoarding by wealthier countries as his government scrambled to curb a steep rise in cases.
On a continental level, only 40m doses of vaccines have been administered so far in Africa – less than 2% of the population, Mr Ramaphosa said.
To address this, the South African President said his government was working with Covax to create a regional hub to produce more vaccines in South Africa.
Covax was created last year to ensure coronavirus vaccine doses were made available around the world, with richer countries subsidising costs for poorer nations.
Covax, led by the WHO and other international organisations, initially set a target of providing two billion doses worldwide by the end of 2021.
Most of those are being donated to poorer nations, where Covax hopes to distribute enough vaccines to protect at least 20% of the populations.